Electron-discharge device



Patented Nov. y10, 11925.

UNITED STATESy PATENT OFFICE.

JOHN L. STELLING, OF BROOKLYN, NEW` YORK, ASSIGNOR TO WESTERN ELECTRIC COMPANY, DTCOBPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ELEcTRoN-DISCHARGE DEVICE.

Application nled July l2, 192s. serial No. 650,999.

To all 'whom it may concer/n.:

Be it known that I, JOHN L. STELLING, a citizen of the United States, residing at Brooklyn, inthe county of Kings, State of New York, have invented certain new and useful Improvements in Electron-Dischar e Devices, 'of which the following is a yful clear, concise, and exact description.

This ,invention relates to electron dis- 10 charge devices, and more especially to vacum tubes in which the electrodes are supported from av collar encircling the stem of the enclosing vessel. y v l The object of this invention is to'insure a firm frictional contact between the collar and the stem, and is attained by roughening the surface of the glass with which the collar contacts. Referring now to the drawings, the singl iigureis an elevation partially broken away of' a vacuum tube embodying the invention.

The enclosing vessel 10 is provided with a re-entrant stem `11, the upper end12 of which comprises a press in rwhich are sealed the leading-in wires for the electrodes. A

corrugated .collar 13 surrounds the lower portion of the stem 11l and has extending therefrom integral arms 14, which'terminatev in corrugated anode y'plates 15. .A block 16 '130 of insulatingmyaterial is supported by the plates 15 at their ends and supports the other electrodes of the tube.

In lorder to insure a tight fric-tional contact between the collar'13 and the stem 11, the latter is ronghened, as shown at 1T. 35 This lougllening may be accomplished in 'any desired manner, but. is preferably attained by sand blasting tlul stem. Thus, when the Collar 13, which is formed of :l

slightly smaller diameter than that of the 40 closing vessel having a reentrant stem, n

collar encircling said stem, the surfacelof the stem in contact with the collar being sand blasted, and an electrode supported by said` collar.

In witness whereof, I hereunto subscribe my name this 7th day of July, A. D. 1928. JOHN L. STELLING. 

